libertas: fix mode initialization problem

After moving lbs_find_best_network_ssid() from scan.c to assoc.c gcc was
able to deduce that new_mode might stay uninitialized.
Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/libertas/assoc.c

@@ -541,7 +541,7 @@ void lbs_association_worker(struct work_struct *work)
 	}
 
 	if (find_any_ssid) {
-		u8 new_mode;
+		u8 new_mode = assoc_req->mode;
 
 		ret = lbs_find_best_network_ssid(priv, assoc_req->ssid,
 				&assoc_req->ssid_len, assoc_req->mode, &new_mode);